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COM20020IP3V bảng dữ liệu(PDF) 22 Page - SMSC Corporation

tên linh kiện COM20020IP3V
Giải thích chi tiết về linh kiện  Universal Local Area Network Controller with 2K x 8 On-Board RAM
PDF  82 Pages
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nhà sản xuất  SMSC [SMSC Corporation]
Trang chủ  http://www.smsc.com
Logo SMSC - SMSC Corporation

COM20020IP3V bảng dữ liệu(HTML) 22 Page - SMSC Corporation

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22
DISCONTINUED DATASHEET
20MHZ
CLOCK
(FOR REF.
ONLY)
nPULSE1
nPULSE2
DIPULSE
RXIN
10
100ns
100ns
200ns
400ns
1
FIGURE 6 - DIPULSE WAVEFORM FOR DATA OF 1-1-0
In typical applications, the serial backplane is
terminated at both ends and a bias is provided by
the external pull-up resistor.
The RXIN signal is directly connected to the cable
via an internal Schmitt trigger. A negative pulse
on this input indicates a logic "1". Lack of pulse
indicates a logic "0".
For typical single-ended
backplane applications, RXIN is connected to
nPULSE1 to make the serial backplane data line.
A ground line (from the coax or twisted pair)
should run in parallel with the signal.
For
applications requiring different treatment of the
receive
signal
(like
filtering
or
squelching),
nPULSE1 and RXIN remain as independent pins.
External differential drivers/receivers for increased
range and common mode noise rejection, for
example,
would
require
the
signals
to
be
independent of one another.



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